(IANAL) Assuming it's not a copyright violation, just a contract violation, if you get access to the model weights without entering said contract you could make a strong case that none of the restrictions apply to you. However, as far as I can tell this is not settled case law, and the entities distributing these model weights are definitely hoping for them to qualify for some level of copyright protection. However, even if thats the case, the resulting images are not currently subject to copyright in the US, and can be used freely by non-parties. Even if that changes down the line, these images would almost certainly be considered derivative works from the model, and these models already assume that training is fair use anyway.